ProfPeg says oxytocin is “overhyped” this is probably the kind of thing she’s referring to.
In 2011 Dr. Paul Zak found that spraying oxytocin up people’s noses made them more likely to trust other people to the extent that they’d give their own money to strangers.Dr. Ruth Feldman from Bar-Ilan University in Israel has found that oxytocin administration to fathers increases their parental engagement, with parallel effects observed in their infants. There were all kinds of concerns that car dealers would pump the stuff into their showrooms
Dr. Zak is a real researcher who’s apparently done respected work, nonetheless this TED talk seems pretty pop sciency to me.